Chapter 7 Tips on Photographing
54
Photographing
Basics of DS-L3
7.3
Calculating the Display Magnification for Microscopic Observation
Pixel sizes of image pickup device on DS camera heads
The table below shows the pixel size (the maximum number of pixels stored) of image pickup device and the
effective area (area for the effective number of pixels stored) of each DS camera head.
Pixel size (μm) Recorded pixel count Effective area (mm)
DS camera head
Width Height Width Height Width Height Diagonal
DS-Fi2/Fi1/Fi1c 3.4 3.4 2560 1920 8.7 6.53 10.88
DS-Vi1 4.4 4.4 1600 1200 7.04 5.28 8.8
DS-Qi1Mc/Ri1 6.45 6.45 1280 1024 8.26 6.6 10.57
Use the following formula for calculating the magnification of the subject on the monitor.
• Magnification on the monitor
Optical magnification (objective lens magnification X relay lens magnification)
X Diagonal size of monitor display
Diagonal size of effective area for image pickup device
Calculation example: built-in monitor (8.4 inch, diagonal: 213 mm)
DS camera head
Magnification of optical
device (example)
Magnification of the subject on the monitor
DS-Fi2/Fi1/Fi1c
Objective lens: 40x
Relay lens: 0.7x
40 x 0.7 x 213 mm / 10.88 mm = Approx. 550
DS-Vi1
Objective lens: 40x
Relay lens: 0.55x
40 x 0.55 x 213 mm / 8.8 mm = Approx. 530
DS-Qi1Mc/Ri1
Objective lens: 40x
Relay lens: 0.7x
40 x 0.7 x 213 mm / 10.57 mm = Approx. 560
Magnification when printed
See “15.3.4 Calculating the Magnification W
hen Printed” for details.
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